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VCDS logging suggestions on what to log.

Discussion in 'A3/S3 Forum (8L Chassis)' started by Westy, Feb 2, 2011.

  1. Westy

    Westy Double Dark Side! Diesel & 8P

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    Right I've just spent £50 on silicone hose, I'm going to get to the bottom of this problem :banghead:

    After i've finished with this lot there will only be a few hoses left. The upper and lower boost hoses will get done when I get my FMIC. Bloody ***** rubber hoses!
     
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  3. Welly

    Welly VX220 SC Driver :)

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    Good to see you battling on through dude. It'll be worth it in the end - some things are a pain, and are expensive, but keep your eye on the prize....
     
  4. Westy

    Westy Double Dark Side! Diesel & 8P

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    It seems like every bit I replace, my fluttering/boost leak gets worse! Sodding thing. I've got a load of 8mm and 13mm hose so I can do all the charcoal canister hose and all the ***** round the inlet mani too.
     
  5. [Dave B]

    [Dave B] Daddy

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    Good luck Westle, I know how irritating this type of thing can be.
     
  6. Westy

    Westy Double Dark Side! Diesel & 8P

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    Cheers mate. I should have all the gear by Thursday and I'm planning another later night mechanics session on Thursday to get it all fitted. I'll keep this thread updated and once the issue has gone I'll get some fresh logs done.
     
  7. Welly

    Welly VX220 SC Driver :)

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    [​IMG]
     
  8. Westy

    Westy Double Dark Side! Diesel & 8P

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    Will I be ok running with a boost leak for the next few days? The car seems to be running ok until i'm on boost then it just gets very noisey with air rushing about!
     
  9. Welly

    Welly VX220 SC Driver :)

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    Yeah, it won't do any lasting damage really. Don't drive it hard obviously though.
     
  10. Westy

    Westy Double Dark Side! Diesel & 8P

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    Thanks, I've been changing gears at 2K revs to stay off boost as much as possible but I jus hate driving the damn thing when its not running correctly.
     
  11. Westy

    Westy Double Dark Side! Diesel & 8P

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    I think i've found a problem! I dont think its the cause of the fluttering but I think it is my main boost leak. Yesterday I noticed that a jubalee clip had been rubbing on the boost hose that runs from the charge pipe into the drivers side SMIC. This clip has been there since the summer when I simplified my breather hoses and fitted my catch can. Last night a strapped up the hose with tape where it had been rubbing and today the rushing air noises has gone.

    I have some upper and lower boost hoses on order so I hope they arrive before the weekend.
     
  12. [Dave B]

    [Dave B] Daddy

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    Well done Westle, lets hope this is the cause of your problem.
     
  13. Westy

    Westy Double Dark Side! Diesel & 8P

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    Thanks mate. I've got enough silicone hose on order to replace the remaining boost hoses so I'm hoping the car will be back to its best again. The clip causing the problem was one thats holding in the one way valve for the brake servo. It was rubbing against the boost hose and had picked away at the outer rubber. The boost leak must have been getting slowly worse since the summer. I've order 2 90 bends to go around the boost hose so this should ensure that any clips are away from the new hose when it's on.
     
  14. Welly

    Welly VX220 SC Driver :)

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    Sounds likely mate - leaks will put everything out, both on boost and idle..

    Fingers crossed dude.
     
  15. Dane

    Dane Had an 8L S3, a B5 RS4 now I have a B8 S4

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    Nice one Westle, hope it sorts it mate.
     
  16. Westy

    Westy Double Dark Side! Diesel & 8P

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    I've got a RR day booked with S3 Baby to go to Bills on 19th March, so whatever I dont pick up before then I'm sure Bill will find.
     
  17. Welly

    Welly VX220 SC Driver :)

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    See you both there! lol
     
  18. Westy

    Westy Double Dark Side! Diesel & 8P

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    lol. Yeah if you and Paul can get there too it would be nice to finally meet you both.
     
  19. Welly

    Welly VX220 SC Driver :)

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    It's Saturday dude - Bill's is standard MO. lol.
     
  20. finesse

    finesse Active Member
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    Cool! 19th March, can I tag along for a rolling road and lumpy idle diagnosis? :) :)
     
  21. Westy

    Westy Double Dark Side! Diesel & 8P

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    Cant see why not mate. Let me confirm with S3 Baby and Bill first.
     
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  23. Westy

    Westy Double Dark Side! Diesel & 8P

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    Ok the tape I put round the possible boost leak didn't last long! Noise and power loss were back last night. Luckily the postman had been this morning and delivered my upper and lower boost hoses. I'm also hoping to get all my othe silicone bits later today too so tonight i'll be getting it all on.

    Will report back in the morning ;)
     
  24. Westy

    Westy Double Dark Side! Diesel & 8P

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    Ok, last night I fitted my intercooler hoses. 1 from charge pipe to drivers side and 1 from passenger side to throttle body. This morning I still have the boost leak!

    I am going to open a complaint with my eBay seller of the forge turbo hose which still hasn't arrived and they have ignored my emails. Tomorrow morning i will remove the existing red turbo hose again ang check it all over again.

    I'm running out of hoses to replace and I still cant pin point the leak. If replacing the red hose doesn't fix the leak then I'll be ordering a FMIC in the next week!
     
  25. s3dave

    s3dave TFSI Hybrid
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    Have you thought about a smoke test or pressure test to find the leaks....may save you bashing your head against the wall...lol
    They are a pain, did you do the catch can?
     
  26. Westy

    Westy Double Dark Side! Diesel & 8P

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    I had a pressure test done 2 years ago and was told there were no leaks anywhere, not even in the SMICs. I've not tried a smoke test yet, think i might phone around and see who can do one locally.

    This has been a good exercise though because most of my old rubber hose has now been replaced with silicone ;)

    Catch can was all done last summer and I've checked over all the new oil hose I put in for the PCV system and it's all fine.
     
  27. Westy

    Westy Double Dark Side! Diesel & 8P

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    Just booked in for a smoke test next friday so I have 1 week to try and find the leak myself.
     
  28. finesse

    finesse Active Member
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    EVAP can
    brake servo hose
    split in tip
    pipe from smic 1 to smic 2
    duff forge dv

    keep trying
     
  29. Westy

    Westy Double Dark Side! Diesel & 8P

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    The leak sounds like its drivers side so I'm thinking charge pipe or SMIC.

    Brake servo hose has been simplified since catch can install was done. I also have some silicone and a new one way valve to replace that hose.
    Tip is a 6 month old Autobahn TIP so I soubt that's a problem.
    The hose from 1 smic to another is a possibility and If the smoke test shows this as the fault, I'll be getting a FMIC
    I've checked the DV and it is working fine.
     
  30. Westy

    Westy Double Dark Side! Diesel & 8P

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    Well all my silicone turned up on Saturday so I set about fitting it. All i'm still waiting for is my Forge red charge pipe hose, which is 2 weeks late as the eBay seller has stitched me up!

    Anyway I found my leak! The red charge pipe hose had started coming away from the charge pipe and that's where boost was p*ssing out. I'm going to do some logging later today now the leak has gone but the car still feels down on power!

    Here is an engine diagram and what I've changed on my car. The green hoses are new and the orange components are new too.

    Original:

    [​IMG]



    Now:

    [​IMG]

    Key:

    1 - Fuel Tank Breather
    2 - Charcoal Filter
    3 - One Way Valve
    4 - Turbo
    5 - Wastgate Actuator
    6 - Diverter Valve
    7 - Brake Servo
    8 - One Way Valve
    9 - N75 Valve
    10 - MAF
    11 - Air Box
    12 - Oil Breather
    13 - N249 vacuum reservoir
    14 - SMIC
    15 - Fuel Pressure Regulator
    16 - Throttle Body
    17 - Inlet Manifold
    18 - Cranckcase Breather Valve
    19 - One Way Valve
    20 - N249
    21 - One Way Valve
    22 - SMIC
     
  31. Essflee

    Essflee Well-Known Member

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    Cheers Westle, very handy diagram, thinking about doing all my pipes too...

    Nice one :)
     
  32. Westy

    Westy Double Dark Side! Diesel & 8P

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    No worries mate, I cant take credit for finding the diagram as Tuffty found it a while ago. I can only take credit for my updated diagram ;)

    I'm running out of things to change now to try and combat my lack of power! I think I'll have to wait for my visit to Bills and see what he finds.
     
  33. Westy

    Westy Double Dark Side! Diesel & 8P

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    Just did some logging and I'm still down on power. Only 191gs from the MAF (238ish bhp)

    Since fitting a new N75 I have no boost spike and the timing isn't being pulled any more that 3.8 degrees so that's much better.
     
  34. s3dave

    s3dave TFSI Hybrid
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    Have you reset the throttle body adaptions? maybe worth a shot...
     
  35. Westy

    Westy Double Dark Side! Diesel & 8P

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    Not since last year when I gave it a clean too. I'll give it a go later.
     
  36. Essflee

    Essflee Well-Known Member

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    What's the highest G/s you can recall having, isn't just the map is it ?
     
  37. Westy

    Westy Double Dark Side! Diesel & 8P

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    I've just done a throttle body alignment but it's made no difference, I cant get above 191gs. Once apon a time I recorded 204gs with the same map.

    Anyway I also found this in VCDS so I think it's time to address the CAT and sensors:

    [​IMG]
     
  38. [Dave B]

    [Dave B] Daddy

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    Does "Failed or Inomplete" inidicate a knackered sensor....?
     
  39. Westy

    Westy Double Dark Side! Diesel & 8P

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    Well the MOT centre said the Cat seems to be fine. I do get some funny voltage readings from the post cat sensor so I'm going to swap a sensor over from S3 Baby's car and see if that solves it.
     
  40. [Dave B]

    [Dave B] Daddy

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    Interesting, I'm sure when I was last logging my car I got the same results on the Catalytic Converter check and another box, but my car recently passed its MOT no problem :uhm:

    Another thing to check.....
     
  41. Westy

    Westy Double Dark Side! Diesel & 8P

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    If you wouldn't mind, could you check it when you get a chance? Cheers.
     
  42. [Dave B]

    [Dave B] Daddy

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    Yeah I'll give it a go tonight and post up.
     

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